SPR™EX Spiral Wound Lining

6″ – 42″ Pipe Lining

No Grout Solution

100% Trenchless

SPR™EX PVC Liner

6" - 42" Pipe Lining

No Grout Solution

100% Trenchless

Expand for a Tight-Fit Liner

SPR™EX is a trenchless lining method for small diameter sewers, storm drains and culverts. SPR™EX is a tight fit liner and does not require annular space grouting. SPR™EX is a structural lining solution that can be designed for fully deteriorated pipes capable of withstanding all applied loads. The PVC profile is wound directly into the host pipe. The hydraulic winding machine is lowered into the access chamber.

The process begins by feeding a PVC strip into the winding machine. The pipe liner is constructed and pushed towards the upstream manhole. Once the liner reaches the termination manhole or structure, the liner is restrained, then expanded creating a tight fit liner. 

SPR™EX Trenchless Lining Process

Videos, Projects & Articles

SPR™EX Lining Process

Expand for a Tight-Fit Liner

SPR EX Product Page

SPR™EX is initially wound at a fixed diameter smaller than the host pipe, resulting in a gap between the pipe liner and host pipe.

Once the SPR™EX reaches the far end manhole  (typically the upstream manhole), the profile’s expansion process begins. A wire within the liner is pulled, severing the secondary, or sacrificial lock. As a result of the lock being cut, successive wraps of profile expand against eachother, increasing the diameter for a tight fit against the pipeline wall.

As the wire is pulled, the process travels back towards the winding machine. Once the liner is expanded and the ends are sealed, the pipe rehabilitation process is complete.

Symbol for sewer pipe lining

Sewer Pipe Lining

Symbol for storm drain rehabilitation

Storm Drain Lining

Symbol for culvert rehabilitation

Culvert Lining

SPR™EX Lining Process

SPR™EX is a tight fit lining solution that does not require annular space grouting. SPR™EX is initially wound at a fixed diameter smaller than the host pipe. This is done so that the liner can negotiate offsets and other host pipe defects without restriction. SPR™EX liners are typically installed from the downstream to the upstream manhole however reverse set-ups are possible.

Once the SPR™EX liner reaches the upstream manhole, the liner is torsionally restrained. Once secured, the operator will then expand the liner.  The expansion process begins when the wire positioned between the primary and secondary (or sacrificial lock) is retracted, severing the secondary lock. This allows for successive wraps of PVC profile to expand, creating a customized tight fit liner against the inside of the host pipe.

As the wire is pulled, the liner continues to expand. The operator will continue to feed additional profile into the host pipe until the entire pipe segment is lined.  Once the liner is expanded, the ends are sealed then the operator can immediately reinstate laterals using industry standard robotic equipment.

SPR™EX expansion process for a tight fit installation

Trenchless Lining Methods

3 Spiral Wound installation methods based upon pipe diameter

Need Information?

Close Menu